3) Now launch your web browser and navigate to the web console. Click on Settings > Downloads & Licensing and proceed to download and install the software. When prompted to reboot the computer un-check the box to select "no" so the computer does not reboot.

4) Click on the "Help" tab on the bottom left of the window and then "Anti-virus Exclusions":

5) On the Anti-virus Exclusions page locate the path to exclude for your antivirus software:

6) Locate the folder path for exclusion depending on if this is a 32 or 64 Bit operating system (find this out here).

7) Return to Windows Defender and set the exclusion path found in step #5. Click Browse and locate the folder from above for Windows 8.1. Click "Add" and then "Save Changes":

In Windows 10 the Exclusion window will look like the screenshot below: